Hello Sunshine
I would like to inform you that you have to go under medical examination for sure as canada pr visa validity is one year from the date of our medical done so if you had done ur medical last february mean if they issued ur visa by this month than you should have one month validity in ur visa so usually they will ask you for medical again so you just now wait for medical request if not getting update from them because they will 99% send u letter stating medical request and this should be positive one like once they receive your medical reports again and found clear as per their requirement than they wil issue visa on the very same moment so wait for medical request again and its really good one because u have single entre visa but long duration as well
So friends just wait and i just got know this and very moment i update here as your medical is expired in feb so u must update about this case